Cranking but not starting until second try.gas smell.Gas line replaced.Had spark plugs, fuel filter changed.Still having starting issues and today noticed leakage near gas tank.

You need to dry it out as stated. Water will not help your engine. You may need to flush the fuel lines with fresh gas. Use an additive in the gas to help absorb the remaining moisture.

If it turns, then the battery is OK. Either spark plugs are not firing in proper order (wrong firing order), no power to spark plugs, or no fuel because of fuel restrictions (dirty fuel filter). Inspect the air filter to ascertain its not clogged air. If you smell gas, then you saturated the spark plugs, which is why it refuses to run.
Let it sit for half hour to let spark plugs dry. Inspect to ascertain its not dirty spark plugs, which will also prevent engine from running. After ascertaining its proper firing order, spark plugs are clean, and there's power to distributor cap, ascertain there's fuel in fuel lines by squirting half second (short squirt) of starting fluid into air filter. Close the air filter housing to trap flammable starting fluid gas. Turn engine without giving throttle. Let starting fluid be ignited by spark plugs. If it won't start, then spark plugs are not firing to ignite starting fluid gas. If it starts briefly, but won't run when you give throttle, but catches when a 2nd person squirts more starting fluid into air filter just before engine stalls, then its a fuel restriction issue or no fuel in fuel lines.

Here's a quote from amy Chilton's manual for 1980-1987.

"Several types of fuel filters are used. One is located in the fuel tank of all the vehicles and is part of the fuel guage assembly. Second is a sealed paper element, in-line unit; mechanical system- located on the engine (above the fuel pump) or electrical system- located in front of the fuel tank. Third is a paper element, in-line fuel filter/vapor separator, housed in a fuel resevoir. Normally, the in-tank filter does not require changing. If it does, the fuel tank must be removed. "
This thing you describe sounds like the typical Chrysler in-line filter of its day. It is nothing more than the same generic in-line plastic see-thru filter you buy for your lawn mower except in the 70's and 80's it was covered in metal and had a Chrysler part number. A lot of guys added an extra filter in those days, it wasn't the best system. I would remove the outlet line and turn the fuel pump on, see if you get fuel. Replace if needed.

Do you have a timing belt issue?

Make sure battery has a full charge. If it cranks good but won't start, check the basics. Have a helper crank it while you visually check for spark at the spark plugs, if spark everywhere, use a gage and check proper fuel pressure. I looked at info for the 3.8L engine, 35--40 psi. Also, after you build fuel pressure, turn off the key, see if fuel pressure holds for a bit? If the pressure drops like a rock, check for fuel pressure leak. Check the vac line for fuel pressure regulator, if it has gas in it, the regulator is faulty, or a leaking fuel injector. The pressure could also drain back through fuel pump.
Also, check fuel injector pulse, engine cranking. Any applicable trouble codes?
Smell of the crankcase oil dipstick, if it smells like gas, either you don't change oil and filter very often or the engine is running very rich for some reason.

wrong vacuum line hooked to fuel regulator

If you put a fuel cleaner additive in the tank I would change the fuel filter. I believe on this model it is located in the frame just ahead of the fuel tank on the drivers side. Any foreign material cut loose from inside the tank from the cleaner often clogs the filter.

ok, check distribuitor rotor, i have same problem, and replace ign coil, if 14 years old

1. cranking is "turning over". Starting is what it is not doing. Did you check for spark at plugs when cranking? Why did you change battery?
If fuel line is frozen, generally freeze takes place in the line. Anything you add to tank will not help at this point. (you can heat line with a hair dryer etc (no torches) Most fuels today contain some alcohol so antifreeze for fuel is pretty much redundant. If you have been cranking it fore some time, it would be a good idea to check spark plugs to make sure they are still dry and not fuel fouled... Liquid gasoline does not burn... only fumes ignite. In cold weather, fuel does not vaporize properly and can easily foul plugs.

To save you all the hassle check your spark plugs & distributor first if you are getting a spark. To do that first take out the number one spark plug wire it will be the one closest to the distributor. Second take out the spark plug, then put the spark plug in the spark plug wire. Turn on the engine u should see a spark at the spark plug if your distributor is ok and spark plug. If not replace your distributor.